Patents by Inventor Venugopalan Vaithyanathan

Venugopalan Vaithyanathan has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 8772122
    Abstract: Programmable metallization memory cells having an active electrode, an opposing inert electrode and a variable resistive element separating the active electrode from the inert electrode. The variable resistive element includes a plurality of alternating solid electrolyte layers and electrically conductive layers. The electrically conductive layers electrically couple the active electrode to the inert electrode in a programmable metallization memory cell. Methods to form the same are also disclosed.
    Type: Grant
    Filed: July 12, 2013
    Date of Patent: July 8, 2014
    Assignee: Seagate Technology LLC
    Inventors: Nurul Amin, Insik Jin, Wei Tian, Andrew James Wirebaugh, Venugopalan Vaithyanathan, Ming Sun
  • Patent number: 8686388
    Abstract: A resistive sense memory cell includes a layer of crystalline praseodymium calcium manganese oxide and a layer of amorphous praseodymium calcium manganese oxide disposed on the layer of crystalline praseodymium calcium manganese oxide forming a resistive sense memory stack. A first and second electrode are separated by the resistive sense memory stack. The resistive sense memory cell can further include an oxygen diffusion barrier layer separating the layer of crystalline praseodymium calcium manganese oxide from the layer of amorphous praseodymium calcium manganese oxide a layer. Methods include depositing an amorphous praseodymium calcium manganese oxide disposed on the layer of crystalline praseodymium calcium manganese oxide forming a resistive sense memory stack.
    Type: Grant
    Filed: July 12, 2012
    Date of Patent: April 1, 2014
    Assignee: Seagater Technology LLC
    Inventors: Andreas Roelofs, Markus Siegert, Venugopalan Vaithyanathan, Wei Tian, Yongchul Ahn, Muralikrishnan Balakrishnan, Olle Heinonen
  • Patent number: 8648426
    Abstract: A transistor including a source; a drain; a gate region, the gate region including a gate; an island; and a gate oxide, wherein the gate oxide is positioned between the gate and the island; and the gate and island are coactively coupled to each other; and a source barrier and a drain barrier, wherein the source barrier separates the source from the gate region and the drain barrier separates the drain from the gate region.
    Type: Grant
    Filed: December 17, 2010
    Date of Patent: February 11, 2014
    Assignee: Seagate Technology LLC
    Inventors: Insik Jin, Wei Tian, Venugopalan Vaithyanathan, Cedric Bedoya, Markus Siegert
  • Publication number: 20130330901
    Abstract: Programmable metallization memory cells having an active electrode, an opposing inert electrode and a variable resistive element separating the active electrode from the inert electrode. The variable resistive element includes a plurality of alternating solid electrolyte layers and electrically conductive layers. The electrically conductive layers electrically couple the active electrode to the inert electrode in a programmable metallization memory cell. Methods to form the same are also disclosed.
    Type: Application
    Filed: July 12, 2013
    Publication date: December 12, 2013
    Inventors: Nurul Amin, Insik Jin, Wei Tian, Andrew James Wirebaugh, Venugopalan Vaithyanathan, Ming Sun
  • Patent number: 8487291
    Abstract: Programmable metallization memory cells having an active electrode, an opposing inert electrode and a variable resistive element separating the active electrode from the inert electrode. The variable resistive element includes a plurality of alternating solid electrolyte layers and electrically conductive layers. The electrically conductive layers electrically couple the active electrode to the inert electrode in a programmable metallization memory cell. Methods to form the same are also disclosed.
    Type: Grant
    Filed: January 30, 2009
    Date of Patent: July 16, 2013
    Assignee: Seagate Technology LLC
    Inventors: Nurul Amin, Insik Jin, Wei Tian, Andrew James Wirebaugh, Venugopalan Vaithyanathan, Ming Sun
  • Patent number: 8446752
    Abstract: An electronic device that includes a first programmable metallization cell (PMC) that includes an active electrode; an inert electrode; and a solid electrolyte layer disposed between the active electrode and the inert electrode; and a second PMC that includes an active electrode; an inert electrode; and a solid electrolyte layer disposed between the active electrode and the inert electrode, wherein the first and second PMCs are electrically connected in anti-parallel.
    Type: Grant
    Filed: July 6, 2009
    Date of Patent: May 21, 2013
    Assignee: Seagate Technology LLC
    Inventors: Ming Sun, Nurul Amin, Insik Jin, Young Pil Kim, Chulmin Jung, Venugopalan Vaithyanathan, Wei Tian, Hai Li
  • Patent number: 8421048
    Abstract: An example memory cell may have at least a tunneling region disposed between a conducting region and a metal region, wherein the tunneling region can have at least an active interface regio disposed between a first tunneling barrier and a second tunneling barrier. A high resistive film is formed in the interface region with migration of ions from both the metal and conducting regions responsive to a write current to program the memory cell to a selected resistive state.
    Type: Grant
    Filed: July 13, 2009
    Date of Patent: April 16, 2013
    Assignee: Seagate Technology LLC
    Inventors: Venugopalan Vaithyanathan, Markus Jan Peter Siegert, Wei Tian, Muralikrishnan Balakrishnan, Insik Jin
  • Patent number: 8367464
    Abstract: A non-volatile memory cell that includes a first electrode; a second electrode; and an electrical contact region that electrically connects the first electrode and the second electrode, the electrical contact region has a end portion and a continuous side portion, and together, the end portion and the continuous side portion form an open cavity, wherein the memory cell has a high resistance state and a low resistance state that can be switched by applying a voltage across the first electrode and the second electrode.
    Type: Grant
    Filed: August 15, 2011
    Date of Patent: February 5, 2013
    Assignee: Seagate Technology LLC
    Inventors: Venugopalan Vaithyanathan, Wei Tian, Insik Jin
  • Patent number: 8309945
    Abstract: Programmable metallization memory cells having a planarized silver electrode and methods of forming the same are disclosed. The programmable metallization memory cells include a first metal contact and a second metal contact, an ion conductor solid electrolyte material is between the first metal contact and the second metal contact, and either a silver alloy doping electrode separates the ion conductor solid electrolyte material from the first metal contact or the second metal contact, or a silver doping electrode separates the ion conductor solid electrolyte material from the first metal contact. The silver electrode includes a silver layer and a metal seed layer separating the silver layer from the first metal contact.
    Type: Grant
    Filed: February 15, 2012
    Date of Patent: November 13, 2012
    Assignee: Seagate Technology LLC
    Inventors: Wei Tian, Dexin Wang, Venugopalan Vaithyanathan, Yang Dong, Muralikrishnan Balakrishnan, Ivan Petrov Ivanov, Ming Sun, Dimitar Velikov Dimitrov
  • Publication number: 20120273744
    Abstract: A resistive sense memory cell includes a layer of crystalline praseodymium calcium manganese oxide and a layer of amorphous praseodymium calcium manganese oxide disposed on the layer of crystalline praseodymium calcium manganese oxide forming a resistive sense memory stack. A first and second electrode are separated by the resistive sense memory stack. The resistive sense memory cell can further include an oxygen diffusion barrier layer separating the layer of crystalline praseodymium calcium manganese oxide from the layer of amorphous praseodymium calcium manganese oxide a layer. Methods include depositing an amorphous praseodymium calcium manganese oxide disposed on the layer of crystalline praseodymium calcium manganese oxide forming a resistive sense memory stack.
    Type: Application
    Filed: July 12, 2012
    Publication date: November 1, 2012
    Applicant: SEAGATE TECHNOLOGY LLC
    Inventors: Andreas Roelofs, Markus Siegert, Venugopalan Vaithyanathan, Wei Tian, Yongchul Ahn, Muralikrishnan Balakrishnan, Olle Heinonen
  • Patent number: 8288254
    Abstract: Programmable metallization memory cells having a planarized silver electrode and methods of forming the same are disclosed. The programmable metallization memory cells include a first metal contact and a second metal contact, an ion conductor solid electrolyte material is between the first metal contact and the second metal contact, and either a silver alloy doping electrode separates the ion conductor solid electrolyte material from the first metal contact or the second metal contact, or a silver doping electrode separates the ion conductor solid electrolyte material from the first metal contact. The silver electrode includes a silver layer and a metal seed layer separating the silver layer from the first metal contact.
    Type: Grant
    Filed: February 8, 2012
    Date of Patent: October 16, 2012
    Assignee: Seagate Technology LLC
    Inventors: Wei Tian, Dexin Wang, Venugopalan Vaithyanathan, Yang Dong, Muralikrishnan Balakrishnan, Ivan Petrov Ivanov, Ming Sun, Dimitar Velikov Dimitrov
  • Patent number: 8288749
    Abstract: A switching element that includes a first semiconductor layer, the first semiconductor layer having a first portion and a second portion; a second semiconductor layer, the second semiconductor layer having a first portion and a second portion; an insulating layer disposed between the first semiconductor layer and the second semiconductor layer; a first metal contact in contact with the first portion of the first semiconductor layer forming a first junction and in contact with the first portion of the second semiconductor layer forming a second junction; a second metal contact in contact with the second portion of the first semiconductor layer forming a third junction and in contact with the second portion of the second semiconductor layer forming a fourth junction, wherein the first junction and the fourth junction are Schottky contacts, and the second junction and the third junction are ohmic contacts.
    Type: Grant
    Filed: April 12, 2012
    Date of Patent: October 16, 2012
    Assignee: Seagate Technology LLC
    Inventors: Young Pil Kim, Nurul Amin, Dadi Setiadi, Venugopalan Vaithyanathan, Wei Tian, Insik Jin
  • Patent number: 8248836
    Abstract: A non-volatile memory cell and method of use thereof. In some embodiments, an individually programmable resistive sense memory (RSM) element is connected in series with a programmable metallization cell (PMC) switching element. In operation, while the switching element is programmed to a first resistive state, no current passes through the RSM element and while a second resistive state is programmed to the RSM element, current passes through the RSM element.
    Type: Grant
    Filed: July 13, 2009
    Date of Patent: August 21, 2012
    Assignee: Seagate Technology LLC
    Inventors: Insik Jin, YoungPil Kim, Ming Sun, Chulmin Jung, Venugopalan Vaithyanathan, Nurul Amin, Wei Tian, Yong Lu
  • Publication number: 20120199936
    Abstract: A switching element that includes a first semiconductor layer, the first semiconductor layer having a first portion and a second portion; a second semiconductor layer, the second semiconductor layer having a first portion and a second portion; an insulating layer disposed between the first semiconductor layer and the second semiconductor layer; a first metal contact in contact with the first portion of the first semiconductor layer forming a first junction and in contact with the first portion of the second semiconductor layer forming a second junction; a second metal contact in contact with the second portion of the first semiconductor layer forming a third junction and in contact with the second portion of the second semiconductor layer forming a fourth junction, wherein the first junction and the fourth junction are Schottky contacts, and the second junction and the third junction are ohmic contacts.
    Type: Application
    Filed: April 12, 2012
    Publication date: August 9, 2012
    Applicant: SEAGATE TECHNOLOGY LLC
    Inventors: Young Pil Kim, Nurul Amin, Dadi Setiadi, Venugopalan Vaithyanathan, Wei Tian, Insik Jin
  • Patent number: 8227783
    Abstract: A resistive sense memory cell includes a layer of crystalline praseodymium calcium manganese oxide and a layer of amorphous praseodymium calcium manganese oxide disposed on the layer of crystalline praseodymium calcium manganese oxide forming a resistive sense memory stack. A first and second electrode are separated by the resistive sense memory stack. The resistive sense memory cell can further include an oxygen diffusion barrier layer separating the layer of crystalline praseodymium calcium manganese oxide from the layer of amorphous praseodymium calcium manganese oxide a layer. Methods include depositing an amorphous praseodymium calcium manganese oxide disposed on the layer of crystalline praseodymium calcium manganese oxide forming a resistive sense memory stack.
    Type: Grant
    Filed: July 13, 2009
    Date of Patent: July 24, 2012
    Assignee: Seagate Technology LLC
    Inventors: Andreas Roelofs, Markus Siegert, Venugopalan Vaithyanathan, Wei Tian, Yongchul Ahn, Muralikrishnan Balakrishnan, Olle Heinonen
  • Publication number: 20120153400
    Abstract: A transistor including a source; a drain; a gate region, the gate region including a gate; an island; and a gate oxide, wherein the gate oxide is positioned between the gate and the island; and the gate and island are coactively coupled to each other; and a source barrier and a drain barrier, wherein the source barrier separates the source from the gate region and the drain barrier separates the drain from the gate region.
    Type: Application
    Filed: December 17, 2010
    Publication date: June 21, 2012
    Applicant: SEAGATE TECHNOLOGY LLC
    Inventors: Insik Jin, Wei Tian, Venugopalan Vaithyanathan, Cedric Bedoya, Markus Siegert
  • Patent number: 8203875
    Abstract: An anti-parallel diode structure and method of fabrication is presently disclosed. In some embodiments, an anti-parallel diode structure has a semiconductor region comprising a first insulator layer disposed between a first semiconductor layer and a second semiconductor layer. The semiconductor region can be bound on a first side by a first metal material and bound on a second side by a second metal material so that current below a predetermined value is prevented from passing through the semiconductor region and current above the predetermined value passes through the semiconductor region.
    Type: Grant
    Filed: January 27, 2011
    Date of Patent: June 19, 2012
    Assignee: Seagate Technology LLC
    Inventors: Nurul Amin, Insik Jim, Venugopalan Vaithyanathan, Wei Tian, YoungPil Kim
  • Patent number: 8203865
    Abstract: A non-volatile memory cell and associated method is disclosed that includes a non-ohmic selection layer. In accordance with some embodiments, a non-volatile memory cell consists of a resistive sense element (RSE) coupled to a non-ohmic selection layer. The selection layer is configured to transition from a first resistive state to a second resistive state in response to a current greater than or equal to a predetermined threshold.
    Type: Grant
    Filed: April 14, 2011
    Date of Patent: June 19, 2012
    Assignee: Seagate Technology LLC
    Inventors: Wei Tian, Insik Jin, Venugopalan Vaithyanathan, Haiwen Xi, Michael Xuefei Tang, Brian Lee
  • Publication number: 20120149183
    Abstract: A switching element that includes a first semiconductor layer, the first semiconductor layer having a first portion and a second portion; a second semiconductor layer, the second semiconductor layer having a first portion and a second portion; an insulating layer disposed between the first semiconductor layer and the second semiconductor layer; a first metal contact in contact with the first portion of the first semiconductor layer forming a first junction and in contact with the first portion of the second semiconductor layer forming a second junction; a second metal contact in contact with the second portion of the first semiconductor layer forming a third junction and in contact with the second portion of the second semiconductor layer forming a fourth junction, wherein the first junction and the fourth junction are Schottky contacts, and the second junction and the third junction are ohmic contacts.
    Type: Application
    Filed: February 20, 2012
    Publication date: June 14, 2012
    Applicant: SEAGATE TECHNOLOGY LLC
    Inventors: Young Pil Kim, Nurul Amin, Dadi Setiadi, Venugopalan Vaithyanathan, Wei Tian, Insik Jin
  • Patent number: 8198181
    Abstract: A switching element that includes a first semiconductor layer, the first semiconductor layer having a first portion and a second portion; a second semiconductor layer, the second semiconductor layer having a first portion and a second portion; an insulating layer disposed between the first semiconductor layer and the second semiconductor layer; a first metal contact in contact with the first portion of the first semiconductor layer forming a first junction and in contact with the first portion of the second semiconductor layer forming a second junction; a second metal contact in contact with the second portion of the first semiconductor layer forming a third junction and in contact with the second portion of the second semiconductor layer forming a fourth junction, wherein the first junction and the fourth junction are Schottky contacts, and the second junction and the third junction are ohmic contacts.
    Type: Grant
    Filed: February 20, 2012
    Date of Patent: June 12, 2012
    Assignee: Seagate Technology LLC
    Inventors: Young Pil Kim, Nurul Amin, Dadi Setiadi, Venugopalan Vaithyanathan, Wei Tian, Insik Jin